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Finding the Fourth Proportional to 660.57, 911.56 and 376.98

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Solution

The fourth proportional to 660.57, 911.56 and 376.98 is: 520.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.57 : 911.56 = 376.98 : x
  2. Step 2: Convert to fraction form
    660.57/911.56 = 376.98/x
  3. Step 3: Cross multiply
    660.57x = 911.56 × 376.98
  4. Step 4: Simplify right side
    660.57x = 343,635.33
  5. Step 5: Solve for x
    x = 343,635.33/660.57
  6. Step 6: Final answer
    x = 520.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.